The battery-saving mode limits background activity of services and apps, as well as visual effects or animations on the OnePlus smartphone to extend battery life.

In addition to manual activation, an automatic schedule can be set to turn on at night, for example, when the device is not in use.

It is also possible to activate the energy saving mode when a specified charge level is reached.
Here we can set a value between 5% and 75%.

Note: Power-saving mode can be (de)activated at any time using the quick settings in the status bar.

Android 10 | OxygenOS 10.0
Step 1:  Open the  Settings
Step 2:  Tap on  Battery
Step 3:  Tap on  Battery Saver
Step 4:  Enable or disable  Battery Saver
  1. Open the Settings
  2. Tap on Battery
  3. Tap on Battery Saver
  4. Enable or disable Battery Saver

OnePlus Instructions